Meridional reorganizations of marine and terrestrial productivity during Heinrich events
To study the response of the global carbon cycle to a weakening of the Atlantic Meridional Overturning Circulation (AMOC), a series of freshwater perturbation experiments is conducted both under preindustrial and glacial conditions using the earth system model of intermediate complexity LOVECLIM. A...
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Language: | English |
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2008
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ftvliz:oai:oma.vliz.be:211453 2023-05-15T17:33:59+02:00 Meridional reorganizations of marine and terrestrial productivity during Heinrich events Menviel, L. Timmermann, A. Mouchet, A. Timm, O. 2008 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=211453 en eng info:eu-repo/semantics/altIdentifier/wos/000252571600001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1029/2007PA001445 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=211453 info:eu-repo/semantics/restrictedAccess %3Ci%3EPaleoceanography+23%281%29%3C%2Fi%3E.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1029%2F2007PA001445%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1029%2F2007PA001445%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2008 ftvliz https://doi.org/10.1029/2007PA001445 2022-05-01T09:40:42Z To study the response of the global carbon cycle to a weakening of the Atlantic Meridional Overturning Circulation (AMOC), a series of freshwater perturbation experiments is conducted both under preindustrial and glacial conditions using the earth system model of intermediate complexity LOVECLIM. A shutdown of the AMOC leads to substantial cooling of the North Atlantic, a weak warming of the Southern Hemisphere, intensification of the northeasterly trade winds, and a southward shift of the Intertropical Convergence Zone (ITCZ). Trade wind anomalies change upwelling in the tropical oceans and hence marine productivity. Furthermore, hydrological changes associated with a southward displacement of the ITCZ lead to a reduction of terrestrial carbon stocks mainly in northern Africa and northern South America in agreement with paleoproxy data. In the freshwater perturbation experiments the ocean acts as a sink of CO 2 , primarily through increased solubility. The net atmospheric CO 2 anomaly induced by a shutdown of the AMOC amounts to about + 15 ppmv and - 10 ppmv for preindustrial and glacial conditions, respectively. This background state dependence can be explained by the fact that the glacial climate is drier and the terrestrial vegetation therefore releases a smaller amount of carbon to the atmosphere. This study demonstrates that the net CO 2 response to large-scale ocean circulation changes has significant contributions both from the terrestrial and marine carbon cycle. Article in Journal/Newspaper North Atlantic Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Paleoceanography 23 1 n/a n/a |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
To study the response of the global carbon cycle to a weakening of the Atlantic Meridional Overturning Circulation (AMOC), a series of freshwater perturbation experiments is conducted both under preindustrial and glacial conditions using the earth system model of intermediate complexity LOVECLIM. A shutdown of the AMOC leads to substantial cooling of the North Atlantic, a weak warming of the Southern Hemisphere, intensification of the northeasterly trade winds, and a southward shift of the Intertropical Convergence Zone (ITCZ). Trade wind anomalies change upwelling in the tropical oceans and hence marine productivity. Furthermore, hydrological changes associated with a southward displacement of the ITCZ lead to a reduction of terrestrial carbon stocks mainly in northern Africa and northern South America in agreement with paleoproxy data. In the freshwater perturbation experiments the ocean acts as a sink of CO 2 , primarily through increased solubility. The net atmospheric CO 2 anomaly induced by a shutdown of the AMOC amounts to about + 15 ppmv and - 10 ppmv for preindustrial and glacial conditions, respectively. This background state dependence can be explained by the fact that the glacial climate is drier and the terrestrial vegetation therefore releases a smaller amount of carbon to the atmosphere. This study demonstrates that the net CO 2 response to large-scale ocean circulation changes has significant contributions both from the terrestrial and marine carbon cycle. |
format |
Article in Journal/Newspaper |
author |
Menviel, L. Timmermann, A. Mouchet, A. Timm, O. |
spellingShingle |
Menviel, L. Timmermann, A. Mouchet, A. Timm, O. Meridional reorganizations of marine and terrestrial productivity during Heinrich events |
author_facet |
Menviel, L. Timmermann, A. Mouchet, A. Timm, O. |
author_sort |
Menviel, L. |
title |
Meridional reorganizations of marine and terrestrial productivity during Heinrich events |
title_short |
Meridional reorganizations of marine and terrestrial productivity during Heinrich events |
title_full |
Meridional reorganizations of marine and terrestrial productivity during Heinrich events |
title_fullStr |
Meridional reorganizations of marine and terrestrial productivity during Heinrich events |
title_full_unstemmed |
Meridional reorganizations of marine and terrestrial productivity during Heinrich events |
title_sort |
meridional reorganizations of marine and terrestrial productivity during heinrich events |
publishDate |
2008 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=211453 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
%3Ci%3EPaleoceanography+23%281%29%3C%2Fi%3E.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1029%2F2007PA001445%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1029%2F2007PA001445%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000252571600001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1029/2007PA001445 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=211453 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1029/2007PA001445 |
container_title |
Paleoceanography |
container_volume |
23 |
container_issue |
1 |
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n/a |
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n/a |
_version_ |
1766132670397415424 |